Shear-Bond Strength of Adhesive Resin Cements to Different Restoration Materials

Objectives:

The purpose of this in-vitro investigation was to compare shear bond strength (SBS) of different adhesive resin cements and their pre-treatment procedures to Titanium, Ni-Cr-Alloy (Remanium®) and Resin Nano Ceramic (RNC, Lava™Ultimate)

Methods:

Materials tested were Multilink®Automix, Variolink®II (both Ivoclar-Vivadent), Panavia™F2.0, Clearfil™Esthetic Cement (both Kuraray), NX3 (Kerr), RelyX™ Ultimate (3M ESPE).

For shear bond strength (SBS) testing, Titanium, Remanium and RNC specimens were pre-treated as recommended by manufacturers' instructions.

Stainless steel rods (diameter 4mm) were cemented under standardized pressure (20 g/mm²) onto the restoration material specimens and light-cured (RNC) or dark-cured (Titanium, Remanium) following the manufacturers' instructions. RelyX Ultimate was used with Scotchbond Universal adhesive (3M ESPE) that serves both as tooth bonding agent and restoration primer. Specimens were stored for 24h at 36°C and 100% relative humidity. Half of the specimens were artificially aged (5.000 thermal cycles, 5°C - 55°C, 30sec dwell time).

SBS was measured using a universal testing machine (Zwick Z010, crosshead speed: 0.75 mm/min).

Data obtained were analyzed using Multiple Range Test (Fisher's LSD; p<0.05;n=6).

Results:

See table. Values in one column marked with the same superscript characters are not statistically different

	Titanium sc		Remanium sc		Lava Ultimate lc
	24h	5000TC	24h	5000TC	24h	5000TC
Clearfil Esthetic Cement/AlloyPrimer	9.8±1.7a	38.5±8.9b	9.5±4.7a	28.1±5.8b	n.d.	n.d.
Multilink Automix/Monobond Plus	38.1±5.2c	36.7±4.4b	35.9±3.7c	27.1±3.3b	29.5±5.3a	44.9±8.4b,c
Panavia F2.0/-/-/ClearfilCeramicPrimer	32.1±2.3b	42.7±8.5b	34.0±2.9c	42.4±6.4c	34.8±6.1a,b	41.3±7.1a,b
NX3/-/-/Silane Primer	31.6±3.4b	19.9±1.1a	25.5±3.6b	15.2±1.9a	38.6±5.3b	47.2±8.7b,c
RelyX Ultimate/Scotchbond Universal	52.1±5.8d	50.9±3.0c	44.3±3.3d	42.0±6.4c	45.3±4.6c	51.2±6.8c
Variolink II/Monobond Plus	n.d.	n.d.	n.d.	n.d.	36.7±4.5b	34.3±8.8a
RelyX Ultimate/RelyX Ceramic Primer	n.d.	n.d.	n.d.	n.d.	48.9±6.0c	44.5±8.5b,c

Conclusions:

RelyX Ultimate and its dedicated pre-treatment protocol with Scotchbond Universal adhesive shows highest adhesion values to all tested restoration materials.